Means for spinning metal



Dec. 3, 1935.

- J. M. WYER MEANS FOR SPINNING METAL Filed Aug. 1, 1954 4 Sheets-Shet 1 $4,, Mmw M 14/ 6,

Dec. 3, 1935. J. M. WYER 2,022,797

MEANS FOR SPINNING METAL Filed Aug. 1, 1934 4 Sheets-Sheet 2 I rn renfg J. M. WYER MEANS FOR SPINNING METAL Dec. 3; 1935.

Filed Aug.

4 Sheets-Sheet 3 Dec. 3, 1935. J, M, WYE' 2,022,791

W MEANS FOR SPINNING METAL Filed Au 1, 1934 '4 Sheets-Sheet '4 Invent? $6 flfams-f/c/el m Patented Dec. 3, i935 UN T D STATES PATEN OFFICE MEANS FOB'SPINNlNG Marlin John Mansfield Wyer, Bradmore, England,

assignor-of one-half to The Midland Metal Spinning Company Limited, Wolverhampton, England Application August 1, 1934, Serial No. 738,0

In Great Britain August 2, 1933 ltClaims. '(01. 113-52) The invention relates to means forfo'rming the necks of soft sheet metal articles, being applicable more especially to one-piece aluminum vessels. Heretofore, in forming necks of sheet metal there is the disadvantage that it cannot be en sured that the .vessels produced do not vary in shape unless a section-chuck is used. The object of this invention is to provide a machine in which the spinning can ratly.

A machine constructed according to this'invention comprises the usual headstock, a chuck for carrying the article. to be operated upon, the latter being'orcou'rse mounted in the chuck with itsopen end extending out therefrom, and also a .carrier adapted to be moved transversely on a' cross guide or saddle which in turn is adapted to be moved endwise on the bed of the machine. The invention is characterized by the provision that the carrier carries a pair of rolls or burnishing tools, one being an external roll or tool and the other an internal rollor tool, and that said 30 rolls or tools are set to such a position radially of, the machine that as they are moved along the work, or as one of them is so moved, they cause the metal of the vessel" to be'displaced radially. The rolls or tools are carried each in a mounting projecting forwardly from a turret or carrier mounted in a carriage in such a manner that it can be given longitudinal and transverse movement. The amount by which the metal is displaced at each operation of the rolls or tools is hereinafter referred to as .the out since it somewhat resembles the cut of a tool on a lathe, but there is, of course, in this case, no actual cutting of the metal. The radial displacement is performed by.

45 a series of longitudinal 'traverses of the carrier;

operator and requires a relatively large amount be done quickly and accu-y erned by automatic stop means. such for instance as a. rotating cam mounted on the saddle. A part of the cam surface engages against a fixed abutment of the machine, preferably on the head stock. In lieu of the cam surface, there may, however, be provided a number of projections of different lengths which engage with theabut- Y ment in turn, one in respect of each forward movement. The transverse movement of the carrier which produces the cut is preferably regulated by means of a second cam "or series of projections, the varying surface of the cam or'the projections engaging against an abutment ofv the carriage. The cams or projections may be moved by the backwardgmovement of the saddle. and )5 this may be effected by a longitudinal springpressed slider which, on each rearward movement of the saddle, encounters an abutment of the machine bed; and means may be provided for moving such abutment out of position for subsequent operations where no variation of the cams is required and to allow the saddle to go weii back to permit of the article being removed from the chuck and another article placed therein.

- inFiK'lli'e 1.

A convenient embodiment of the invention is described with reference to the drawings herewith, of -which:-. a,

Figure 1 is a-front elevation of a machine for forming the neck of an aluminum flask, accord ing to the invention.

Figure 2 is a plan view of the machine shown Figure 3 is a view. to an enlarged scale, to illustra'te, in plan view, a' portion of the machine; 7

shown in plan in Figure 2.

Figure 4 is a longitudinal section taken on the irregular line 4, l, of Figure 3.1

Figure 5 is a sectional view corresponding to Figure 4, but showing the carrier and saddle as in their extreme rearward position.

Figure 6 is a view corresponding to Figure but showing the carrier and saddle in the rearward position to which theyare brought between each cut.

Figure 7 is a vertical section taken on the irregular line I, 'I' of Figure 3 and looking in the direction of the arrow of that figure.

Figure 8 is a'fragmentary sectional plan view,

the section being taken in the plane indicated by the line I. 8, of Figure 7. In this view the carrier and saddle are in their forward position. Figure 9 is a-view corresponding to Figure 8;

butshowing the carrier and saddle in the position to which they are brought at the end of each cut.

Figures 10 and 11 are plan views, partly in section, to illustrate two positionsof a tripping lever, 'the section being taken on the line it, it, of Figure 7.

Figure 12 is a fragmentary plan-view, partly in section, to illustrate the first engagement of the rolls on the work.

Figure 13 is a fragmentary plan view, partly in section, to illustrate the position of the rolls at the end of the first out. In this view subsequent cuts are shown by broken lines. This view also shows other tools on the carrier or turret for further operations.

Figures 14 and 15 are fragmentary plan views to illustrate two subsequent operations.

In these drawings, ,A is a carrier or turret of square form as seen in plan, and turnably mount- 'ed upon a carriage B sliding on a saddle C, which in turn, slides upon the bed D of the machine. The turret A carries, on three of its sides, operating tools which will be hereinafter described, and it is turned by the operator to bring the requisite tools into position, after which it is locked by a locking handle E in a manner already well known. Other tools for any other desired operation may bemounted on the fourth side of the turret.

F is the head stock of the machine, in which is journalled the mandrei (not shown) which carries the usual driving pulleys G andcarries also a chuck l-i forcarryingand supporting the are two arbors P, Q, of which the arbor P carries an internal roll R while the arbor Q carries an external roll S. The first operation on the vessel is performed with these two rolls which are brought to such positions v(see Figure 12) that initially the roll R. has a short distance 111-- wards of the inner periphery of the article and the roll S is spaced away from the roll R by an amount which is not less than the thickness of the -metal of the article. The result of this is' that as the rolls are pressed forward by the endwisemovement of the cross slide, under the action of the lever L, the metal of the article is trapped between them and carried radially inward and this reduces the diameter for the distance of the travel. The end of the travel is indicated in Figure 13'. The rolls are then drawn back endwise to the starting position and'this operation further smooths the work. The carriage is moved inward a slight distance in the direction of the arrow inFigure 12 during the last part of the backward movement, and on completion of the backward movement, the full amount for the new i out has been imparted to the carriage. Another cut is then taken on the forward movement, but this time the travel is shorter; and, at'each succeeding cut, the travel is reduced. The several cuts are shown by broken lines in Figure 13, and finally the article has formed thereon the neck '1, joining'into' the body of the vessel by the double curved shoulder'U. The shape of the shoulder is determined by the several points at which the forward movement of thcsaddle is stopped, and by the several points atr'which the carriage is stopped when moved over the cross slide. Both of these sets of points-are deteran anti-clockwise direction upon the bed of the saddle C, being impelled intermittently each time the cross slide is brought back after each of the several operations above described. 7

The forward movement of. the saddle vC -is stopped by the engagement of the operative surface a of the cam V against the head of a set pin b'which is screwed into a pillar c clamped on the bed of the machine. The transverse -movement of the carriage B is stopped by the engagement, against the operative surface (1 of the cam W, of a peg e adjustably fitted into a socket of the carriage. B and secured by a set screw 9. The set pin b is adjusted as to length by' screwing it in relation to the pillar c, after which it is locked by a lock-nut f.

' Each of the cams V and W is keyed to a bush it (see Figures 8 to 11) and keyed to the same bush are a toothed. drag wheel 9' and the centre member of a toothed sprocket free wheel is which, when turned anti-clockwise, drives the bush but turns freely upon it in the opposite direction. Engaging with the drag wheel 7' is aspring pressed plunger m (see Figure 10) to act as a drag to hold the wheel after each turning movement. The sprocket wheel is is turned by a roller rack n on a sliding piece p which slides in guides of the saddle and is constantly pressed ina rearward direction by a small coil spring q bearing rearwardly against the slider and forwardly against an abutment r. 's' is a screwed.

extension of the slider passing through the abutment 1' and having lock-nuts t which act as a stop to the rearward movement of the slider 2 u is a set pin having a saw-cut head .12 and being adjustably screwed on to the rearward end of the slider p being locked by a lock-nut w. a is a stop finger pivoted by a horizontal pivot axis 17' to a bracket 0' bolted on the machine bed. The finger is supported in such a manner that it cannot move down past the horizontal and is adapted to engage (when the, saddle is moved back after performing a cut on the vessel J") with the saw-cut v in the set pin it. The first effect of this is to cause the slide p to move forward in relation to the saddle C, whereby the rack 12 imparts a turning movement, in an anticlockwise direction, to the sprocket wheel k and consequently also to the cams V and W bringing them to a. fresh position. The slide p is moved forward against the pressure of the coil spring q and is stopped by its forward end coming against the abutment T which consequently acts also as a stop to the rearward movement of the saddle.

A roller d is mounted upon a horizontal pin e screwed into a vertical plunger 1" sliding in a vertical guide 9 of the saddle C. The plunger 1' is constantly pressed, in an upward direction by a coil spring h and is normally held down by a trip lever 7", the outer end of which normally lies over the plunger I (see Figure 1 -1). The trip lever is pivoted at k and has, at its inner end, a nose m' which, at one position of m of the trip lever- 7", it snaps thereinto and ,until the screw it comes against a stop 11. on the bracket 0'. The roller d and plunger 1' are returned to their normal position by the engagement of the roller (1' with'a slanting face '0 on the stop 11.. The encountering of the pin .11, with the stop it gives a further angular movement to the sprocket wheel is arid drag wheel 1i and cams V and W, whereby the nose m is forced out of the notch 11. and restored to the periphery of the shouldered-down portion p, and the outer end of the trip lever 7" again covers the plunger 1" whereby, when the saddle goes forward again, carrying forward the roller (1 iromunder the stop a, the roller is held down, and the ringer a can come back to the horizontal and return to the position shown in Figure 4 when the saddle has been moved sufliciently for forward to perform the next series of rolling down operations.

The machine is operated as foilows:-Assuming that the rolls R and Sara in the position shown in Figure 12, the saddle is moved forward by means of the lever L to bring the tools It and S to the position shown in Figure ,3. The

various parts of the machine will then be in v the position shown in Figures 1,2, 3, 8, and 13. The first cut will then have been taken by the rolls R and S, having been kept in the correct position across the machine by means of the operating lever N, which moves the carriage B across until stopped by the finger e coming against the surface d of the cam W. In asimilar manner, the saddle was moved forward during the out by the lever L until the surface it oi the cam V came against the set pin 1). The saddle is then moved back by the lever L until the pin it encounters the finger a. (see Figures ii, 9 and 11). As above described, this limits the rearward movement 01 the saddle and also moves forward the slide 11 in relation-there-= to. This, during the last part, of the rearward movement of the saddle, moves the rack and imparts a small angular movement to the sprocket wheel I: and hence to the drag wheel a and cams V and W. The saddle meanwhile has been moved forward again by the operator to put on additional cut, because the pin e now encounters a part of the surface (I which is of less diameter. The out will also be shorter because the set pinit will encounter a portion of "the sur- Conse iace a which is of greater diameter. quently each succeeding cut is of shorter length and the neck of the vessel is brought to the stage indicated by broken lines in'Figure l3 and by full lines in Figures 14 and 15. As willbe understood, the particular shape of the-curve of the shoulder results from the particular shapes or the cams. If other shapes are desired, correspondingly shaped cams are substituted.

When the saddle is moved backatter the last out but one and the slide 9 is moved forward as before, it brings the notch n opposite the nose m so that the nose can snap into the notch. This causes the outer end of the trip lever j to move from over the plunger f as already described.

the roller (1' is under the finger a and the latter is in the notch 12 or the screw it. As soon as the saddle is moved forward again, however, for the,

last cut, the roller (1 lifts the finger a; and, on the next rearward .movement of. the saddle, both the screw u and the slanting face t ride under the finger and lift it. Hence the cams are not operated on this last rearward movement.

( The plunger does not immediately go up because The rearward movement of the saddle is checked, by the operator, before the pin it reaches the stop u, and in this position, the turret is .unlocked by the hand lever E and turned a quarter turn in a clockwise direction to bring, into operative position, a pair of planishing rolls a. b (see Figure 14), the forward movement of the saddle being stopped by the cam V coming against the pin 1) because in the last out there was no further movement of the cams. The saddle is again moved back but still not far enough for the pin u to encounter the stop u. The turret is again unlocked and given another quarter turn in a clockwise direction. -This presents the last set of tools consisting of a trimming tool 0 a flanging roller (1 and a curling tool e (see Figure 15).

The operation on the work is now complete. The saddle is now moved back as far as it will go causing the pin a to encounter the stop u and thus again rotate the cams as above described, bringing them to the starting position and resetting the trip lever 11" over the plunger f as already described, the latter being held down for such rear engagement because the roller d is under the stop. u .as above described. The turret is again unlocked and turned through 180 degrees to bring it to the starting positionand the work is released from. the chuck and a fresh vessel inserted. p

In lieu of moving forward the carriage B and the saddle C by hand levers, the cams may be so arranged that they perform such movements.

Having fully described my invention what I claim and. desire to secure by Letters Patent is 1. In a. machine for operating on a sheet metal vessel, a chuck for carrying the work, a carrier,

a saddle on which said carrier is movabletransversely and which is itselfmovable endwise on the" machine bed, a-dispiacing tool mounted on said carrier and an abutment tool, one tool being external to the work and the other internal, said tools being so set transversely otthe machine that as the saddle is moved endwise they operate on the work to cause metal thereof to be displaced radially.

2. In a machine for operating on a sheet metal vessel, 9. chuck for carrying the work, a carrier, a saddle on which said carrier is movable transversely and which is itself movable endwise on the machine bed, a pair of displacing rolls mounted on said carrier, one roll being external to the work and the other internal, said rolls being saddle, a cam surface of said cam with which,

said stop is adapted to engage and means whereby said cam is turned automatically through a suitable angle for each operation of the machine.

5. In a machine as in claim 1, means whereby the saddle is moved forward for each cut and means whereby the degree of such movement is automatically controlled for each successive cut, whereby the requisite shape of the work is obtained.

6. In a machine as in claim 1, a stop fixed'in relation to the machine, acam'turnably mounted on said saddle, a cam surface of said cam with which said stop is adapted to engage and means whereby said cam is turned automatically through a suitable angle at each operation of the machine.

, 7. In a machine for operating on a sheet metal vessel, 9. chuck for carrying the work, a carrier, a saddle on which said carrier is movable transversely and which is itself movable endwise on:

to engage, meanstwhereby'said cam is turned automatically througha suitable angle for each operation of the machine, a pinion with which said cams are-drivingly connected, an endway sliding rack with which said pinion engages, and a stop on said machine with which said rack is adapted to engage, whereby said cams may be turned through the requisite angle at the end of each rearward movement of the saddle.

8. In a machine for operating on a sheet metal vessel, a chuck for carrying the work, a carrier, a saddle on which said carrier is movable transversely and which is itself movable endwise on the machine'bed, a displacing tool mounted on said carrier and anabutment tool, one tool being external to the work and the other internal, said tools being so set transversely of the machine that as the saddle is moved endwise they operate on the work to cause metal there of to be displaced radially, a stop fixed in relation to the machine, a cam turnably mounted on said saddle, a cam surface of said cam with which said stop is adapted to engage, means whereby said cam is turned automatically through a suitable angle at each operation of the ma chine, a pinion with which said cnns'are drivwhich said pinion engages, and i. stop on said machine with which said rack is adapted to en-- gage, whereby said cams may be turned through the requisite angle at the end of each rearward movement of the saddle.

--9. In a machine as defined in claim '7, a finger constituting said stop and being pivoted in relation to the machine, means whereby said finger is normally held with its end in the path of the rack, and means whereby said finger may have its end removed from said path.

10'. In a machine as defined in claim 8, a finger constituting said'stop and being pivoted in relation'to the machine, means whereby said finger is normally held with its end in the path slot 9. flattened forward end of said finger is adapted to engage. i v

11. In a machine as defined in claim 7, a finger constituting said stop and being pivoted inrelation to the machine, means whereby said -5 finger: is normally held with its end in the path finger is normally held with its end in the path oi? the rack, means whereby said finger may have its end removed fromsaid path, a spring so presmd plunger, a sideway projection therefrom, said projection being adapted to engage against -,said finger to move it out of the path of said rack, a trip lever normally holding said plunger against the force of its spring to keep said pro- 25' jection from moving said finger, a cylindrical surface on a part turnably mounted on said saddle, said part being turned by said pinion, a notch in said cylindrical surface, a nose on said trip lever adapted normally to lie on said 30 surface at which position of said trip lever it acts to hold said plunger against the force of its spring, but on turning of said cylindrical surface, said nose enters said notch causing said trip lever to release said plunger, whereby its 35 projection moves said finger out of the path of the said rack.

13. In a machine as defined in claim '7, a finger constituting said stop and being pivoted in relation to the machine, means whereby said finger is 40 normally held with its end in the path of the rack, means whereby said finger may have its end removed from said path, a spring pressed plunger,

a sideway projection therefro--, said projection being adapted to engage against said fingerto i5- move it out of the path of said rack, a trip lever normally holding said plunger against the force of its, spring to keep said projection from moving said finger, a cylindrical surface on a part turnably mounted on said saddle, said pailbeing so turned by said pinion, a notch in said cylindrical surface, a nose on said trip lever adaptei nor mally to lie on said surface at which position of said trip lever it acts to hold said plunger against the force of its spring, but on turning of said cyiindricai surfaca'said nose enters said notch causing said trip lever to release said plunger whereby its projection moves said finger out of the path of the said rack, an inclined face at the rear of the machine with which said projection of said plunger engages on extreme rearward movement of the saddle, whereby said plunger is moved against the force of its spring to allow said trip lever to engage over said plunger.

14. In a machine for operating on a sheet metal 35 vessel, a chuck for carryingthe work, a carrier, a saddle on which said carrier is movable transversely and which is itself movable endwise on the machine bed, a displacing tool mounted on said carrier and an abutment toolyone tool being 70. external to the work and the other internal, said tools being so set transversely of the machine that as the saddle is moved endwise they operate on, the work to cause metal thereof to be displaced radially, a stop on said carrier, a cam tum- Y5.

ablymountedon said saddle, a cam surface of said cam with which said stop is adapted to engage, means whereby said cam is turned automatically through a suitable angle for each operation of the machine, a finger constituting said stop and being pivoted in relation to the machine, means whereby said finger is normally held with its end in thepath of the rack, means whereby said finger may have its end removed from said path, and a stop at the rear of the machine with which said rack may engage on extreme rearward movement of the saddle, so that said cams may be turned through the requisite angle to reset them whilesaid finger is out of the path of the said rack. I

15. In a machine as defined in claim 7, a finger constituting said stop and being pivoted in rela' tion to the machine, means whereby said finger is normally held with its end in the path of the rack, means whereby said finger may have its end removed from said path, a spring pressed plunger, a sideway projection therefrom, said projection being adapted to engage against said finger to move it out of the path of said rack, a trip lever normally holding said plunger against the force of its spring to keep said projection from moving said finger, a cylindrical surface on a part turnably mounted on said saddle, said part being turned by said pinion, a notch insaid cylindrical surface, a nose on said trip lever adapted normally to lie on said surface at which position 01' said trip lever it acts to hold said plunger against the force of'itsspring, but on turning of said cylindrical surface said nose enters said notch causing said trip lever to release said plunger whereby its projection moves said finger out of the path oi! the said rack, and a stop at the rear of the machine with which said rackmay engage on extreme rearward movement of the saddle so that said cylindrical surface may be turned to cause said nose on said trip lever to ride out of the said notch.

16. In a machine for operating on a sheet metal 5 vessel, a chuck for carrying the work, a carrier, a saddle on which said carrier is movable transversely and which is itself movable endwise on the machine bed, a displacing tool mounted on said carrier and an abutment tool, one tool being external to the work and the other internal, said tools being so set transversely of the machine that as the saddleis moved endwise they operate on the work to cause metal thereof to be displaced radially, means after each operation or cut to move the carrier transversely to put on further cut? for the next operation, automatic stop means, and means for throwing said automatic stop means out of action for further operations of the machine. i 17. In a machine for operating on a sheet metal vessel, a chuck for carrying the work, a carrier, a saddle on which said carrier is movable transversely and which is itself movable endwise on the machine bed, a displacing tool mounted on said carrier and an abutment tool, one tool being ex- 

